It was reported that some travelling fans shouted discriminatory remarks during the clash at Vicarage Road.

Chelsea manager Maurizio Sarri believes his club’s battle to curb racist incidents among their fanbase is a “fight against stupid people” following further allegations of racist chanting by fans during the 2-1 win at Watford on Boxing Day.

A minority of the away end were reported to have shouted discriminatory remarks during the clash at Vicarage Road.

Chelsea suspended four people from attending matches earlier this month while the club carries out an investigation into allegations Manchester City star Raheem Sterling was racially abused at Stamford Bridge.

And just days later UEFA also opened an investigation into alleged anti-Semitic chanting during a Europa League game in Hungary.